4. Molecular markers for fruit/flesh colour
Apart from characterization and assessment of chemical diversity, Feria-Romero et al. (2009) used RAPD amplification method to identify molecular markers associated with high quercetin accumulation in the leaves of guava trees, selected from four different Mexican agronomic regions. Nadgav (2010) tried to asso- ciate SPAR markers with the pink colour of guava and found four primers (FP1/RP1, FP1/RP2, FP2/RP2 and FP3/RP1), out of nine,yielding polymorphic bands which proved promising for further detailed analysis. Sixty nine Psidium accessions were characterized to develop new cultivars that relate with high nutritional components (Santos et al., 2011). Kanupriya et al. (2011) characterized nine guava cultivars using 23 microsatellite markers and generated the barcodes, derived from the allelic variation of the microsatellite loci that clearly differentiated the cultivars under study in two groups viz: pink flesh varieties and white flesh varieties. The poly- morphic information contents of the markers ranged from 0.340 to 0.900 with a mean of 0.749.